1. Content Quality

Google assesses the quality of webpages for its search rankings through a combination of human evaluations and machine learning processes.

2. Backlinks

Google relies on the PageRank algorithm to determine the trustworthiness and relevance of webpages by analyzing the inclusion of pertinent links from external websites. 

3. Content Relevance 

Google's primary objective is to ascertain the relevance of webpages to a given search query, subsequently ranking the most pertinent pages accordingly. 

4. Page Performance 

Google employs a set of metrics known as Core Web Vitals to evaluate a webpage's performance concerning factors such as speed, responsiveness, and visual stability. 

5. HTTPS 

Google checks if a website employs a secure, encrypted connection and slightly favors websites that do so in its ranking algorithm.